Main.js

var PS = {};

// ....

(function(exports) {
  var Data_Maybe = PS["Data.Maybe"];
  var Control_Apply = PS["Control.Apply"];
  var Data_Functor = PS["Data.Functor"];
  var add = function (x) {
      return function (y) {
          return x + y | 0;
      };
  };
  var result = Control_Apply.apply(Data_Maybe.applyMaybe)
    (Data_Functor.map(Data_Maybe.functorMaybe)(add)
      (new Data_Maybe.Just(1)))
    (new Data_Maybe.Just(2));

  exports["result"] = result;
})(PS["Main"] = PS["Main"] || {});